Reduce buggy usage of the registry controlled domain service.

chrome/browser/supervised_user/supervised_user_url_filter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_URL_FILTER_H_
 #define CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_URL_FILTER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 85 matching lines @@
   // - If the pattern starts with "*.", it matches the host or any subdomain
   //   (e.g. the pattern "*.google.com" would match google.com, www.google.com,
   //   or accounts.google.com).
   // - If the pattern ends with ".*", it matches the host on any known TLD
   //   (e.g. the pattern "google.*" would match google.com or google.co.uk).
   // See the SupervisedUserURLFilterTest.HostMatchesPattern unit test for more
   // examples.
   // Asterisks in other parts of the pattern are not allowed.
   // |host| and |pattern| are assumed to be normalized to lower-case.
   // This method is public for testing.
-  static bool HostMatchesPattern(const std::string& host,
+  static bool HostMatchesPattern(const std::string& canonical_host,
                                  const std::string& pattern);
 
   // Returns the filtering behavior for a given URL, based on the default
   // behavior and whether it is on a site list.
   FilteringBehavior GetFilteringBehaviorForURL(const GURL& url) const;
 
   // Checks for a manual setting (i.e. manual exceptions and content packs)
   // for the given URL. If there is one, returns true and writes the result
   // into |behavior|. Otherwise returns false; in this case the value of
   // |behavior| is unspecified.
@@ skipping 100 matching lines @@
   re2::RE2 amp_cache_path_regex_;
   re2::RE2 google_amp_viewer_path_regex_;
   re2::RE2 google_web_cache_query_regex_;
 
   scoped_refptr<base::TaskRunner> blocking_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserURLFilter);
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_URL_FILTER_H_